Biseswar Pal (15) of Phoolbagan was reportedly missing from the school on Saturday, family members alleged.
School authorities, however, claimed that Biseswar was suspended from school over a month ago for tampering with his marksheet and was absent on Saturday.
Infuriated family members of Biseswar today held demonstration inside the 186-year-old school and police had to intervene, a senior police officer said.
A case of under Section 363 IPC (kidnapping) was recorded against unknown persons and search for the teenager was launched, he said.
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